Colonia Maseca Wastewater Treatment Plant, Nueva Rosita, Coahuila

Colonia Maseca is a municipal wastewater treatment plant located in Nueva Rosita, within the municipality of San Juan de Sabinas, Coahuila, Mexico. The plant serves a population of approximately 2,738 residents, making it a small-scale facility in the region. The plant employs secondary treatment processes, which is the standard level required under Mexican regulations (NOM-001-SEMARNAT-1996) for municipal wastewater. With a designed capacity of 648.00 cubic meters per day and an actual discharge volume of 259.20 cubic meters per day, the facility operates well within its capacity, indicating potential for future growth. The treated effluent is discharged into local water bodies that ultimately drain into the Rio Grande basin, which flows into the Gulf of Mexico. This downstream connection underscores the plant's role in protecting both local and transboundary water quality, as the Rio Grande is a critical water resource for both Mexico and the United States.

The plant discharges into the Rio Grande basin, which flows through arid and semi-arid regions of northern Mexico and southern Texas before reaching the Gulf of Mexico. This watershed supports diverse aquatic life and is a vital water source for agriculture and communities. The secondary treatment helps reduce organic pollutants and suspended solids, mitigating impacts on downstream ecosystems.